This paper summarizes some of the recent advances in III-nitride microstructures and micro-size emitters made by the author’s group. Microstructures discussed include micro-size disk, ring, and pyramid structures. Optical mode behaviors in these microcavities were probed by optical pumping and measuring the photoluminescence (PL) emission from individual cavities. It was found that the microdis...

New semiconductor microdisk and microcylinder resonant cavities have been studied with measured lasing emission wavelength at l51550 nm, l5980 nm, and l5510 nm. Position in a cylinder is specified by natural axial coordinate z, radial coordinate r, and azimuthal angle u. Isolated short cylinders are disks of thickness L. The design and optimization of a semiconductor microdisk laser is critical...

We demonstrate a method for adiabatically self-tuning a silicon microdisk resonator. This mechanism is not only able to sensitively probe the fast nonlinear cavity dynamics, but also provides various optical functionalities like pulse compression, shaping, and tunable time delay.

We present a novel broadband microwave photonic phase shifter based on a single III-V microdisk resonator heterogeneously integrated on a silicon-on-insulator waveguide. Fully 2π phase shift tunability is accomplished by free-carrierinduced effective index modulation.

We report the fabrication and experimental characterization of an ultra-high Q microdisk resonator in a silicon-on-insulator (SOI) platform. We examine the role of the substrate in the performance of such microdisk resonators. While substrate leakage loss has warranted the necessity of substrate undercut structures in the past, we show here that the substrate has a very useful role to play for ...

A novel tunable microdisk resonator with integrated MEMS actuator to alter coupling gap is proposed and experimentally demonstrated for the first time. The fabricated device shows a transmittance change about 8dB and a quality factor of 6200.

The authors experimentally demonstrate feedback-controlled electro-optic bistability in the whispering gallery travelling-wave optical resonance of a LiNbO3 microdisk. Simulations confirm the physical origin of the behaviour.

A novel virus-like particle (TMV-VLP) receptor layer has been integrated with an optical microdisk resonator transducer for biosensing applications. This bioreceptor layer is functionalized with selective peptides that encode unique recognition affinities. Integration of bioreceptors with sensor platforms is very challenging due their very different compatibility regimes. The TMV-VLP nanorecept...

We present a general method for the factor calculation in optical microcavities. The analysis is based on the classical model for atomic transitions in a semiconductor active medium. The finite-difference time-domain method is used to evolve the electromagnetic fields of the system and calculate the total radiated energy, as well as the energy radiated into the mode of interest. We analyze the ...

We report a Silicon nano-opto-mechanical device in which a nanomechanical doubly-clamped beam resonator is integrated to an optical microdisk cavity. Small flexural oscillations of the beam cause intensity modulations in the circulating optical field in the nearby microdisk cavity. By monitoring the corresponding fluctuations in the cavity transmission via a fiber-taper, one can detect these os...